Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/15513#discussion_r85625485
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
---
@@ -82,7 +90,16 @@ case class CreateArray(children: Seq[Expression])
extends Expression {
* The children are a flatted sequence of kv pairs, e.g. (key1, value1,
key2, value2, ...)
*/
@ExpressionDescription(
- usage = "_FUNC_(key0, value0, key1, value1...) - Creates a map with the
given key/value pairs.")
+ usage = "_FUNC_(key0, value0, key1, value1...) - Creates a map with the
given key/value pairs.",
+ extended = """
+ Arguments:
+ key - an expression of any type.
+ value - an expression of any type.
--- End diff --
```sql
spark-sql> SELECT map(1, array(1)), map(1, struct(1)), map(1, map(1, 1));
{1:[1]} {1:{"col1":1}} {1:{1:1}}
```
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